change detekt rules config file (Draegerwerk#201)

disable some rules and change some limits to reduce the amount of
non-issues being reported as issues by detekt

# Checklist

The following aspects have been respected by the author of this pull
request, confirmed by both pull request assignee **and** reviewer:

* Adherence to coding conventions
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  * [x] Reviewer
* Adherence to javadoc conventions
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  * [x] Reviewer
* Changelog update (necessity checked and entry added or not added
respectively)
  * [x] Pull Request Assignee
  * [x] Reviewer
* README update (necessity checked and entry added or not added
respectively)
  * [x] Pull Request Assignee
  * [x] Reviewer
* config update (necessity checked and entry added or not added
respectively)
  * [x] Pull Request Assignee
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* SDCcc executable ran against a test device (if necessary)
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dev_config/detekt.yml

@@ -24,12 +24,16 @@ complexity:
     threshold: 6
   ComplexInterface:
     active: true
+  CyclomaticComplexMethod:
+    threshold: 20
+  LongMethod:
+    active: false
   MethodOverloading:
     active: true
   NamedArguments:
     active: true
   NestedBlockDepth:
-    threshold: 6
+    active: false
   ReplaceSafeCallChainWithRun:
     active: true
   StringLiteralDuplication:
@@ -152,8 +156,6 @@ style:
     max: 3
   SpacingBetweenPackageAndImports:
     active: true
-  StringShouldBeRawString:
-    active: true
   TrailingWhitespace:
     active: true
   TrimMultilineRawString: